BZOJ5404 [HN集训2018] party [树链剖分/Hall定理/二分答案]
BZOJ4538 [HNOI2016]网络 [卡常/树链剖分/堆]
LP3313 [SDOI2014]旅行 [动态开点线段树]
HN集训 day1
[SDOI2017] 树点涂色 [LCT/线段树/LCA]